#Problems on Numbers #Magme 043

#Problems on Numbers  #Magme 043

1. Which one of the following is not a prime number?

A.31                                       B.61                                       C.71                                       D.91

2. (112 x 5⁴) = ?

A.67000                                B.70000                                C.76500                                D.77200

3. It is being given that (232 + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?

A.(2¹⁶ + 1)                            B.(2¹⁶ - 1)                             C.(7 x 2²³)                            D.(2⁹⁶ + 1)

4. What least number must be added to 1056, so that the sum is completely divisible by 23 ?

A.2                         B.3                          C.18                       D.21                       E.None of these

5. 1397 x 1397 = ?

A.1951609                           B.1981709                            C.18362619                         D.2031719                          

E.None of these

6. How many of the following numbers are divisible by 132 ?

264, 396, 462, 792, 968, 2178, 5184, 6336

A.4                         B.5                          C.6                          D.7

7. (935421 x 625) = ?

A.575648125                       B.584638125                       C.584649125                       D.585628125

8. The largest 4 digit number exactly divisible by 88 is:

A.9944                  B.9768                   C.9988                   D.8888                  E.None of these

9. Which of the following is a prime number ?

A.33                       B.81                       C.93                       D.97

10. What is the unit digit in {(6374)¹⁷⁹³ x (625)³¹⁷ x (341)⁴⁹¹}?

A.0                         B.2                          C.3                          D.5

Answer keys

1.D	2.B	3.D	4.A	5.A
6.A	7.B	8.A	9.D	10.A