### Some questions asked in DU JAT 2020

**What number should come next in the series?**

**1/2, 1/3, 1/8, 1/30, ?**

**a. 1/64**

**b. 1/48**

**c. 1/144**

**d. 1/72**

Ans. c

Sol. 1/2 - 1/3 = 1/6

1/3 - 1/8 = 5/24

1/8 - 1/30 = 11/120

Hence, denominators of the differences are multiplied by 4, 5 and 6 and numeratos increasing by 4, 6 and 8. Hence the next difference should be 19/720.

So, the next number = 1/30 – 19/720 = 1/144

** For the series: 2, 4, 6, 10, __, 10, 12, 10, 14, 16 …, what number should be filled in the blank?**

**a. 6**

**b. 8**

**c. 12**

**d. 14**

Ans. b

Sol. The series is a part 2, 4, 6, 8, 10, 12, 14, 16, 18,

10’s are inserted after every 3rd number to make 2, 4, 6, __10__, 8, 10, 12, __10__, 14, 16, 18, __10__

Want more questions to practice? Check our Test Series for DU JAT. Click here and here.

**Choose the one that does not belong to the group.**

**a. 7 : 20**

**b. 4 : 12**

**c. 2 : 5**

**d. 9 : 26**

Ans. b

Sol. 20 = 7 × 3 – 1, 5 = 2 × 3 – 1 ; 26 = 9 × 3 – 1 (use BODMAS)

**10 men and 15 women together can complete a work in 6 days. It takes 100 days for one man alone to complete the same work. How many days will be required for one woman alone to complete the work?**

**a. 90**

**b. 225**

**c. 145**

**d. 150**

Ans. b

Sol. If 1 man finishes the work in 100 days, then 100 men will finish the work in 1 day.

Similarly, 10 men and 15 women can finish the work in 6 days.

So, 60 men and 90 women can finish the work in 1 day.

Hence 60 men + 90 women = 100 men

Or 90 women = 40 men

Hence 225 women = 100 men

Hence 100 men or 225 women can finish the work in 1 day.

Hence, 1 women can finish the work in 225 days.

Want more questions to practice? Check our Test Series for DU JAT. Click here and here.