Question 1 of 10
A can complete a work in 12 days and B can complete the same work in 18 days. In how many days can they complete the work together?
Explanation: A's 1 day work = 1/12
B's 1 day work = 1/18
Together = 1/12 + 1/18 = 5/36
Required days = 36/5 = 7.2 days
Question 2 of 10
A sum of Rs. 20,000 is invested at 10% simple interest per annum. What will be the interest after 3 years?
Explanation: SI = (P × R × T)/100
= (20000 × 10 × 3)/100
= Rs. 6,000
Question 3 of 10
Find the next number: 2, 6, 12, 20, 30, ?
Explanation: Pattern:
2+4=6
6+6=12
12+8=20
20+10=30
30+12=42
Question 4 of 10
Book : Read :: Food : ?
Explanation: Book is read; Food is eaten.
Question 5 of 10
The population of a town increases by 20% and then decreases by 20%. What is the net percentage change?
Explanation: Assume population = 100
After 20% increase = 120
After 20% decrease = 96
Decrease = 4%
Question 6 of 10
If NEPAL is coded as OFQBM, then KATHMANDU is coded as:
Explanation: Each letter is shifted by +1:
K→L, A→B, T→U, H→I, M→N, A→B, N→O, D→E, U→V
Question 7 of 10
A can do a work in 15 days and B in 20 days. They work together for 4 days. What fraction of the work remains?
Explanation: One day work together:
1/15 + 1/20 = 7/60
Work done in 4 days:
4 × 7/60 = 28/60 = 7/15
Remaining:
1 − 7/15 = 8/15
(Correct remaining fraction is 8/15)
Question 8 of 10
Rs. 10,000 amounts to Rs. 12,100 in 2 years at compound interest. What is the rate?
Explanation: 10000(1+r)² = 12100
(1+r)² = 1.21
1+r = 1.1
r = 10%
Question 9 of 10
Ram is taller than Shyam. Hari is shorter than Shyam. Who is the tallest?
Explanation: Ram > Shyam > Hari
Therefore Ram is tallest.
Question 10 of 10
Find the next number: 1, 4, 9, 16, 25, 36, ?
Explanation: Series of perfect squares:
1², 2², 3², 4², 5², 6²
Next = 7² = 49
