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How many of 14 digit numbers we can make with 1,2,3,4,5 that are
divisible by 4. Repetitions allowed.

Read Solution (Total 1)

According divisibility rule, last digits are divisible by 4 means that whole number divisible by 4. Last two digit divisible by 4 are : 12,24,32,44,52. So total 5 numbers. The remaining 12 digits are 5^12. Because repetitions allowed. So total 14 digit numbers are = 5^12*5 = 5^13 = 1220703125
13 years agoHelpfull: Yes(24) No(1)

TCS Other Question

Six friends decide to share a big cake. Since all of them like the cake, they begin quarreling who gets to first cut and have a piece of
the cake. One friend suggests that they have a blindfold friend choose
from well shuffled set of cards numbered one to six. You check and find that this method works as it should simulating a fair throw of a die. You check by performing multiple simultaneous trials of picking the cards blindfold and throwing a die. You note that the number shown by the method of picking up a card and throwing a real world die, sums to a number between 2 and 12. Which total would be likely to appear more often 8,9 or 10?
a) 8 b) All are equally likely c) 9 d) 10 Which is the smallest no which divides 2880 and gives a perfect
square?
a) 4 b) 9 c) 3 d) 5