number of factors of 432. .
In how many ways can 3663 be expressed as a
product of two factors except 1 and itself?
When n is divided by 7 the remainder is 4.
What is the remainder when n2 - n is divided by 49? .
Find the greatest fraction among the
Three bells rang simultaneously at 9 a. m.
The first bell rings every 15 minutes, the second bell rings every 20 minutes
and the third bell rings every 25 minutes. At what time immediately after 9
a.m. would all the bells ring simultaneously. .
(a) 12 pm
(b) 3 pm
(c) 2 pm
(d) 1 pm
The L.C.M. of two positive integers exceeds
their H.C.F. by 875. Their L.C.M. is 36 times their H.C.F. If the smaller
integer is 25, find the largest integer. .
Find the greatest number which divides 6155
and 4935 and leaves remainders of 5 and 15 respectively. .
Find the greatest number that leaves the
same remainder when it divides 49, 97 and 189. .
If n is a natural number, then for what
values of n is 52n - 1 is divisible by 8?
(a) Even values of n
(b) Odd values of n
(c) All values of n
(d) No value of n
sum of all the digits of the numbers from 20 to 119. .