DoubtNut Interview Questions

Give two dice – one is a standard dice, the other is blank (nothing painted on any of the faces). The problem is to paint the blank dice in such a manner so that when you roll both of them together, the sum of both the faces should lie between 1 and 12. Numbers from 1-12 (both inclusive) equally likely.

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A family I know has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. How many brothers and sisters are there?

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Which is a better offer out of (i) a cash payment now of Rs.8100 or (ii) a credit of Rs.8250 after 6 months(6.5% S.I)
A. (i)
B. (ii)
C. both (i) and (ii)
D. none

356 viewsAdmin Changed status to publish December 31, 2021Aptitude True Discount

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How do you propose to compensate for your lack of experience?

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Find the square root of 784 by the long-division method.
A. 24
B. 26
C. 28
D. 30

225 viewsAdmin Changed status to publish November 23, 2021Aptitude Square root and Cube root

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A boat running downstream covers a distance of 30km in 2hours. While coming back the boat takes 6 hours to cover the same distance. If the speed of the current is half that of the boat, what is the sp
A. 5 Km/hr
B. 10 Km/hr
C. 15 Km/hr
D. 20 Km/hr

189 viewsAdmin Changed status to publish January 3, 2022Aptitude Boats and Streams

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Find the sum 3/10 + 5/100 + 8/1000 in decimal form ?
A. 0.358
B. 3.58
C. 35.8
D. None of the above

185 viewsAdmin Changed status to publish December 24, 2021Aptitude Fractions and Decimals

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The number of proper subsets of the set {1, 2, 3} is.
A. 2
B. 4
C. 6
D. 8

197 viewsAdmin Changed status to publish January 5, 2022Aptitude Relations and Functions

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A — B will contain elements in ?
A. A not in B
B. B not in A
C. Both A and B
D. Neither A nor B

487 viewsAdmin Changed status to publish January 5, 2022Aptitude Relations and Functions

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The average of 35 numbers is 25. If each number is multiplied by 5, find the new average?

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There are 9 balls of equal size and same weight(they look similar) except 1. How many weights required to find the dissimilar ball using a weighing balance?

475 viewsGeneral Aptitude

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Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is -.
A. 17/10
B. 17/20
C. 17/30
D. 17/40

178 viewsAdmin Changed status to publish January 3, 2022Aptitude Probability

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What will be the true discount for the present worth of ₹ 600 for a period of 4 yr at 4% per annum rate of interest?
A. 66
B. 76
C. 86
D. 96

559 viewsAdmin Changed status to publish December 31, 2021Aptitude True Discount

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Two circles , one circle is inscribed and another circle is outscribed over a square. What is the ratio of area of inner to outer circle.

1.33K viewsGeneral Aptitude

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You are a bug sitting in one corner of a cubic room. You wish to walk (no flying) to the extreme opposite corner (the one farthest from you). Describe the shortest path that you can walk?

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