Practice Questions & Answers :: SBI Clerk Mains

Answer: Option C

7 hens (7 heads, 14 legs)
7 cows (7 heads, 28 legs)
total legs 42
total heads 14 twice then 28 then legs 14 more than head

Answer: Option C

When there largest or greatest we should take HCF. So
HCF of 98,182,266 is 14. So, 14 is the answer.

Answer: Option D

for 30 employee,avg is 4000
total salary of 30 is 30*4000=120000
after manager added,
(120000+manager salary)/31 = 4300
120000+manager salary=4300*31=133300
manager salary= 133300-120000
=13300

Answer: Option C

It's a permutation question.
there are totally 10 numbers and in which 3 and 5 are already fixed as first two digits.
hence total numbers n=8
and the remaining digits which are needed to be formed its 4 digits apart from the first two digits already formed in the 6 digit phone number.
so r=4
permutation formula npr=n!/(n-r)!
=8!/4!
=8*7*6*5*4*3*2*1/4*3*2*1
=8*7*6*5
=1680

Answer: Option A

we Assume 3 numbers A,B,C
A=16
B=22
C=?
A+B+C/3=16+22+C/3=20
38+C/3=20
38+C=60
C=22

Answer: Option D

non leap year has 365 days.
subtract 1st day of january, remaining days is 364 days.
364%7=0(no remainder)
so last day is sunday.
0->sunday
1->monday.......6->saturday.

Answer: Option C

For successive meters the cost of boring will be 4, 6, 8, 10, ......., which forms an arithmetic series with terms n=50, first term a=4 & difference d=2
So Sum=(n/2)[2a+(n-1)d]= Total cost of boring
=(50/2)[2*4+(50-1)*2]=25(8+98)
= 2650

Answer: Option A

1st person sing with 3,4,5 and 6 (singing time 8 min as it take each song 2 min) means 2 and 7 were adjacent to him.
2nd person sing with 4,5,6 and 7(singing time 8 min) means 1 and 3 were adjacent to him. (total singing time so far is 16 min).
3rd person will sing with 5, 6 and 7(singing time 6 min) as he has already sang with 1. Also 2 and 4 were adjacent to him.(total singing time 22 min so far).
4th person will sing with 6 and 7(singing time 4 min). (total singing time 26 min so far).
5th person will sing with only 7(singing time 2 min). (total singing time 28 min).
6 and 7th persons will not sing anymore as they had already sang with every possible person(see the above singing data) (so total singing time is 28 min)

Answer: Option D

Solve by applying Simple alligation rule.

Answer: Option B

Total age of 12 students = 12*20 = 240 (Since average is 20)
After one more student included, average decreases by 1.
It means, Average age of 13 students = 19
Total age of 13 students = 19*13 = 247
Therefore, age of 13th student = 247-240 = 7yrs.