If the digit in the unit's place of a two-digit number is halved and the digit in ten's place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

From the passage: There are 240 students in an engineering college. Each student opted f...

By what percent is the number of boys who opted for Mechanical more than the total number of students who opted for Electronics?

Given below are two statements : Statement I : In order to get a mixture worth ₹16.5/kg, a grocer needs to mix two varieties of pulses costing ₹15 and ₹20 per kg respectively in the ratio 7 : 3. Statement II : A merchant has 1000 kg rice, part of which he sells at 8% profit and t…

Match List-I with List-II List I: (A) Duplicate of ratio 2 : 7; (B) Compound ratio of 2 : 7, 5 : 3 and 4 : 7; (C) Ratio of 2 : 7 is same as; (D) Ratio of 5 : 6 is same as List II: (I) 25 : 30; (II) 4 : 49; (III) 40 : 147; (IV) 4 : 14 Choose the correct answer from the options giv…

(A) If 1/x : 1/y : 1/z = 2 : 3 : 5, then x : y : z = 15 : 10 : 6 (B) If 4p = 6q = 9r, then p : q : r = 9 : 6 : 4 (C) If 2A = 3B = 4C, then A : B : C = 3 : 4 : 6 (D) If P : Q : R = 2 : 3 : 4, then P/Q : Q/R : R/P = 9 : 8 : 24 Choose the correct answer from the options given below:

A certain amount of money at compound interest grows to ₹66,550 in 3 years and ₹73,205 in 4 years. The rate percent per annum is :

A glass jar contains 1 red, 3 green, 2 blue and 4 yellow marbles. If a single marble is chosen at random from the jar (A) Probability of getting a yellow marble is 1/5 (B) Probability of getting a green marble is 3/10 (C) Probability of getting either a yellow or a green marble i…

Match List-I with List-II List I: (A) √[(0.81 × 0.484)/(0.064 × 6.25)]; (B) √[(0.204 × 42)/(0.07 × 3.4)]; (C) √[(0.081 × 0.324 × 4.624)/(1.5625 × 0.0289 × 72.9 × 64)]; (D) √[(9.5 × 0.085)/(0.0017 × 0.19)] List II: (I) 0.024; (II) 0.99; (III) 50; (IV) 6 Choose the correct answer f…

Arrange the following in increasing order: (A) 16⅔ % (B) 2/15 (C) 0.17 (D) 0.25 % of 64 Choose the correct answer from the options given below: