CBSE Class 3 Mathematics IMO Olympiad MCQs with Answers Set I

Section I : Logical Reasoning

Question. How many more squares must be shaded so that 2/3 of the figure is shaded?

(A) 3
(B) 4
(C) 5
(D) 6
Answer : B

Question. Which of the following statements is correct?

(A) A is lighter than B.
(B) A is as heavy as B.
(C) C is lighter than B.
(D) Both A and C are heavier than B.
Answer : D

Question. Mohit is thinking of a two-digit number. The digit in the one’s place is 4 more than that in the ten’s place. Given that the digit in the ten’s place is 7 less than the largest 1-digit number, what is the number that Mohit is thinking of ?
(A) 24
(B) 62
(C) 26
(D) 42
Answer : C

Question. Set ______ has 6 more beads than Set _____.

(A) A; B
(B) B; C
(C) C; D
(D) D; B
Answer : D

Question. Which of the following statements about the buildings shown here is incorrect?

(A) Building A is the shortest.
(B) Building C is taller than building B but shorter than building A.
(C) Building B is the tallest.
(D) Building A is shorter than building B.
Answer : B

Question. A 3-digit number can be divided by both 2 and 5. The digit in the hundred's place is 7 and the digit in the ten's place is 9. Find the digit in the one's place.
(A) 0
(B) 2
(C) 5
(D) 8
Answer : A

Question. A book has 50 pages. Rajesh crosses out 4 odd-numbered pages and 5 evennumbered pages. How many even-numbered pages are not crossed out?
(A) 9
(B) 20
(C) 21
(D) 39
Answer : B

Question. What is the number on the 4th shirt to the left of 3rd shirt from the right end ?

(A) 7
(B) 9
(C) 23
(D) 2
Answer : B

Question. What is the missing number ?

(A) 16
(B) 19
(C) 24
(D) 30
Answer : C

Question. Which of the following options completes the Fig. (X) ?

Answer : C

Section II : Mathematical reasoning

Question. Which of the following statements is true?
(A) The sum of two odd numbers is an odd number.
(B) The sum of an odd number and an even number is an even number.
(C) The difference between two even numbers is an odd number.
(D) The difference between two odd numbers is an even number
.Answer : D

Question. Arrange these numbers from the greatest to the smallest :
56, 3 × 8, 29, 2 × 7, 2, 19
(A) 56, 29, 3 × 8, 19, 2 × 7, 2
(B) 56, 2 × 7, 3 × 8, 29, 2, 19
(C) 2, 2 × 7, 19, 3 × 8, 29, 56
(D) 2 × 7, 3 × 8, 29, 2, 19, 56
Answer : A

Question. Find the difference between the greatest and the smallest 4-digit numbers formed using the digits 6, 0, 3 and 2.
(A) 4207
(B) 4284
(C) 4316
(D) 6084
Answer : B

Question. If 21 + 22 + 23 + 24 + 25 is equal to 115, which of the following has the same value as 31 + 32 + 33 + 34 + 35?
(A) 115 + 5
(B) 115 + 25
(C) 115 + 30
(D) 115 + 50
Answer : D

Question. What is the missing number that shall go in the given box?
(A) 0
(B) 4
(C) 5
(D) 9
Answer : D

Question. 5263 = ________
(A) 5260 tens 3 ones
(B) 526 tens 63 ones
(C) 526 tens 3 ones
(D) 52 tens 63 ones
Answer : C

Question. How many sevens are there in 735?
(A) 15
(B) 17
(C) 105
(D) 150
Answer : C

Question. Maria's father does not often go to sleep until midnight on week days. Which of the following clocks shows the correct time when Maria’s father goes to sleep?

Answer : A

Question. 9 × _____ = 64 – 37
(A) 2
(B) 3
(C) 4
(D) 5
Answer : B

Question. What is 23 tens 5 ones more than 40 tens 15 ones?
(A) 605
(B) 640
(C) 645
(D) 650
Answer : D

DIRECTION (Q.No. 21-22) : Look at the given graph and answer the following questions.

Question. How many pupils played basketball?
(A) 4
(B) 20
(C) 50
(D) 40
Answer : D

Question. How many fewer pupils played tennis than cricket?
(A) 10
(B) 20
(C) 80
(D) 100
Answer : B

Question. Manoj usually takes 40 minutes to travel to school by bus. If he misses the bus, it will take another 20 minutes for the next bus to come. If he misses the bus at 8 a.m., what is the earliest time Manoj can reach his school?
(A) 9:00 a.m.
(B) 8:50 a.m.
(C) 9:10 a.m.
(D) 8:40 a.m.
Answer : A

Question. Sonia had ₹ 216. She had twice as much money as her sister. How much money did they have altogether?
(A) ₹ 624
(B) ₹ 324
(C) ₹ 648
(D) ₹ 650
Answer : B

Question. Which of the following contains the greatest amount of water?
(A) A cup
(B) A fish tank
(C) A kettle
(D) A swimming pool
Answer : D

Section III : Everyday Mathematics

Question. When Aakash finished his homework, his watch showed that the time was 1:20 p.m. The watch was 15 minutes fast. Aakash took 1 hour 45 minutes to complete his homework. What was the actual time that he started doing his homework?
(A) 10:20 a.m.
(B) 11:20 a.m.
(C) 11:39 a.m.
(D) 11:50 a.m.
Answer : B

Question. Ali read from page 137 to page 645 of his storybook last night. How many pages did he read in total?
(A) 508
(B) 509
(C) 512
(D) 523
Answer : B

Question. An orange and a pear have a total weight of 490 grams. The pear has a weight of 260 grams. How much lighter is the orange than the pear?
(A) 30 grams
(B) 90 grams
(C) 230 grams
(D) 150 grams
Answer : A

Question. A teacher gave 4 identical sweet packets to her 8 pupils. The pupils shared the sweets equally among themselves. If each packet contained 24 sweets, how many sweets did each pupil receive?
(A) 8
(B) 40
(C) 32
(D) 12
Answer : D

Question. A box contains 8 muffins. Teena baked 250 chocolate muffins and 120 vanilla muffins. What is the least number of boxes that Teena will need to contain all her muffins if chocolate muffins and vanilla muffins are packed separately?
(A) 58
(B) 42
(C) 47
(D) 18
Answer : C

Question. Two pens will be given free for every 8 pens. How many pens will Ashu have altogether if he paid for 24 pens ?
(A) 26
(B) 32
(C) 34
(D) 30
Answer : D

Question. There are 24 students in the class. There are 2 pairs of female twins in the class and the rest of the students are boys. How many boys are there in the class?
(A) 16
(B) 18
(C) 20
(D) 22
Answer : C

Question. An apple costs ₹ 8. An orange costs ₹ 2 less than an apple. What is the total cost of 6 apples and 8 oranges?
(A) ₹ 48
(B) ₹ 96
(C) ₹ 69
(D) ₹ 106
Answer : B

Question. Naman left school at 10 minutes to 2 in the afternoon. He arrived home at 3:20 p.m. How long did he take to travel from his school to his home?
(A) 30 minutes
(B) 1 hour 10 minutes
(C) 1 hour 20 minutes
(D) 1 hour 30 minutes
Answer : D

Question. When a number is divided by 14, the quotient is 3. What is the quotient if the number is divided by 7?
(A) 6
(B) 7
(C) 14
(D) 17
Answer : A