Numbers Questions Answers (MCQ) listings with explanations are important for BANK PO, Clerk, IBPS, SBI-PO, RBI, MBA, MAT, CAT, IIFT, IGNOU, SSC CGL, CBI, CPO, CLAT, CTET, NDA, CDS, Specialist Officers and other competitive exams.

1) 6897 is divisible

• 1) 11 only
• 2) 19 only
• 3) both 11 and 19
• 4) neither 11 nor 19
Ans.   C
Explanation :

2) The greatest number by which the product of three consecutive multiples of 3 is alw

• 1) 54
• 2) 81
• 3) 162
• 4) 243
Ans.   C
Explanation :
3*6*9 = 162

3) What least number must be subtracted from 427398 so that remaining number is divisible by

• 1) 3
• 2) 5
• 3) 7
• 4) 9
Ans.   A
Explanation :
On dividing 427398 by 15 we get the remainder 3, so 3 should be subtracted

4) A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as remainder. The number

• 1) 22030
• 2) 220030
• 3) 23030
• 4) 24030
Ans.   B
Explanation :
(555 + 445) * 2 * 110 + 30 = 220000 + 30 = 220030

5) 587 * 999

• 1) 586411
• 2) 586413
• 3) 486411
• 4) 486413
Ans.   B
Explanation :
Trick: 587 * (1000 - 1) = 587000 - 587 = 586413

6) 469157 * 9

• 1) 1691100843
• 2) 4591100843
• 3) 4691100843
• 4) 3691100843
Ans.   C
Explanation :
469157 * (10000 - 1) = 4691570000 - 469157 = 4691100843

7) 1307 * 1307

• 1) 1608249
• 2) 1508249
• 3) 1408249
• 4) 1708249
Ans.   D
Explanation :
\begin{aligned} (a + b)^{2} = (a^2 + b^2 + 2ab) \end{aligned} \begin{aligned} 1307^{2} = (1300 + 7)^2 = (1690000 + 49 + 18200) \end{aligned}

8) 217 * 217 + 183 *

• 1) 70578
• 2) 82578
• 3) 80578
• 4) 80568
Ans.   C
Explanation :
\begin{aligned} \frac {1}{2}\times 2(a^2 + b^2) = \frac {1}{2} \times [(a + b)^2 + (a - b)^2] \end{aligned} \begin{aligned} = \frac {1}{2} \times [(217 + 183)^2 + (217 - 183)^2] = 80578 \end{aligned}

9) For the integer n, if n*n*n is odd, then what is t

• 1) n is odd and n*n is even
• 2) n*n is odd
• 3) n is even
• 4) n*n is odd
Ans.   A
Explanation :

10) There are four prime numbers written in ascending order. The product of first three is 385 and that of last three is 1001. The last number

• 1) 9
• 2) 13
• 3) 15
• 4) 12