CBSE Class 10 Mathematics Real Numbers MCQs Set A

More Questions:

More MCQs for Class 10 Mathematics Real Numbers............

Question : 7×11×13× 6 is:
a) a prime number
b) a composite number
c) an even number
d) None
Answer : B

Question : If a < b < c < d < e are consecutive positive integers, such that b + c+ d is a perfect square and a +b + c + d + e is a perfect cube. What is the smallest possible value of c?
a) 675
b) 576
c) 475
d) 384
Answer : A

Question : If we divide a two-digit number by the sum of its digits we get 4 as quotient and 3 as remainder.
Now if we divide that two digit number by the product of its digits, we get 3 as quotient and 5 as remainder. The two digit number is:
a) Even
b) Odd prime
c) Odd composite
d) Odd
Answer : B

Question : Four positive integers sum to 125. If the first of these numbers is increased by 4, the second is decreased by 4, the third is multiplied by 4 and the fourth is divided by 4, we find four equal numbers, then four original integers are:
a) 16, 24, 5, 80
b) 8, 22, 38, 57
c) 7, 19, 46, 53
d) 12, 28, 40, 45
Answer : A

Question : What is the least number which when divided by 42, 72 and 84 leaves the remainder 25, 55 and 67 respectively?
a) 521
b) 512
c) 504
d) 487
Answer : D

Question : y, z are integers, then the value of x + y - z is:
a) 6
b) 8
c) 7
d) -2
Answer : C

Question : A positive integer n has 60 divisors and 7 n has 80 divisors. What is the greatest integer k such that 7k divides n?
a) 0
b) 1
c) 2
d) 3
Answer : D

Question : What is the largest integer that is a divisor of (n +1) (n+3) (n+5) (n+7) (n+9) for all positive even integers n?
a) 3
b) 5
c) 11
d) 15
Answer : B

Question : The sum of 18 consecutive positive integers is a perfect square. The smallest possible value of this sum is…
a) 169
b) 225
c) 289
d) 361
Answer : B

Question : When the decimal point of a certain positive decimal number is moved two places to the right, the new number is two times the sum of the original number and the reciprocal of the original number. The product of 42 and the original number is:
a) 3
b) 6
c) 7
d) 14
Answer : C

Question : The sum of seven consecutive natural numbers is 1617. How many of these are prime?
a) 4
b) 5
c) 2
d) 7
Answer : A

Question : A number when divided by 342 gives a remainder 47. When the same number is divided by 19, what would be the remainder?
(A 9
b) 8
c) 18
d) 11
Answer : C

Question : If xyz + xy + xz + yz + x + y + z = 384where x, y, z are positive integers, then the value of x + y + z is:
a) 23
b) 18
c) 20
d) 35
Answer : A

Question : Let x be the greatest number by which if we divide 366, 513 and 324, then in each case the remainder is the same. The sum of digit of x is:
a) 3
b) 4
c) 5
d) 7
Answer : B

Question : If a number m is divided by 5 leaves a remainder 2, while another number n is divided by 5 leaves a remainder 4, then the remainder when (m + n) is divided by 5 is:
a) 1
b) 2
c) 3
d) 4
Answer : B

Question : Among the numbers 2²⁵⁰ 3²⁰⁰ 4¹⁵⁰ 5¹⁰⁰ 2 ,3 ,4 and 5 the greatest is
a) 2 250
b) 3 200
c) 4 150
d) 5 100
Answer : A

Question : The sum of the digit in (10⁴ⁿ²+8 +1)² , , where ‘n’ is a positive integer, is……….
a) 4
b) 4n
c) 2+2n
d) 4n²
Answer : C

Question : The ascending order of √2 ³√4, ⁴√6 is:
a)  √2, ³√4, ⁴√6
b)  √2, ⁴√6, ³√4
c) 3√4 √2, 4√6
d) ⁴√6, ³√4, √2
Answer : B