Practice MCQ Questions and Answer on Number System

21.

Three numbers are in Arithmetic progression (AP) whose sum is 30 and the product is 910. Then the greatest number in the AP is:

  • (A) 17
  • (B) 15
  • (C) 13
  • (D) 10

22.

What number multiplied by 48 will give the same product as 173 multiplied by 240 ?

  • (A) 495
  • (B) 545
  • (C) 685
  • (D) 865

23.

111, 111, 111, 111 is divisible by :

  • (A) 3 and 37 only
  • (B) 3, 11 and 37 only
  • (C) 3, 11, 37 and 111 only
  • (D) 3, 11, 37, 111 and 1001

24.

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term?

  • (A) 3
  • (B) 5
  • (C) 7
  • (D) 8

25.

Given n = 1 + x and x is the product of four consecutive integers. Then which of the following us true ?
I. n is an odd integer.
II. n is prime.
III. n is a perfect square

  • (A) Only I is correct
  • (B) Only III is correct
  • (C) Both I and II are correct
  • (D) Both I and III are correct

26.

How many number are there between 1 to 200 which are divisible by 3 but not by 7?

  • (A) 38
  • (B) 45
  • (C) 57
  • (D) 66

27.

A, B, C and D purchase a gift worth Rs. 60. A pays 12 of what others are paying. B pays 13 of what others are paying and C pays 14 of what others are paying. What is the amount paid by D ?

  • (A) 13
  • (B) 15
  • (C) 12
  • (D) 14

28.

There are 2 teams-A and B. If 3 people are shifted from Team A to Team B, then Team B has thrice the number of members than Team A. If 2 people are shifted from Team B to Team A, then Team B has double the number of members than Team A. How many members does Team B have originally?

  • (A) 15
  • (B) 18
  • (C) 42
  • (D) 45

29.

In a certain series, each number except the first and second is obtained by adding the previous two numbers. If the first no is 2 and sixth no is 26, then the seventh number is:

  • (A) 52
  • (B) 46
  • (C) 40
  • (D) 42

30.

Which of following can never be ending of a perfect square?

  • (A) 00
  • (B) 000
  • (C) 1
  • (D) 6