Below are some Aptitude number QUESTIONS
(1) Which below number is not a prime number?
(a)31
(b)13
(c)71
(d)91
Answer:- (d) because 91 is divisible by 7

(2)Find largest number of 4 digit divisble by 88 from below given number
(a)9888
(b)9944
(c)8888
(d)9768
Answer:-to GET answer we will divide largest 4 digit number 9999 by 88 and we will get reminder 55 and subtract this number from 9999 and will get the answer
9999-55=9944

(3) Find the value (635235 x 625) = ?
(a)397021875
(b)397042875
(c)497021875
(d)345001875
Answer: to get answer we need to SPLIT the short item 625 in easy way like
625=5 raise to power 4 and this should be 10/2 raise to power 4 so we will get 635235*10*10*10*10 means 6352350000/16 we get the =397021875

(4)value of 1397*1397
(a)1951609
(b)1981709
(c)18362619
(d)2031719
Answer:- (1397)^2=(1400-3)^2=(1400)^2+3^2-2*1400*3=1960000+9-8400=1951609