1 of 3 〉
What number has 5 to 1 ratio to the number 10?
42
55
50
60
Answer: 50 Explanation:Given, ratio is 5 : 1 that means antecedent is 5 times greater than the consequent. Given consequent = 10, so the number is 10 × 5 = 50 answer.
2 of 3 〉
There are 120 students in a picnic tour, if ratio of girls and boys is 5 : 7 then how many boys are in this tour?
50
70
55
120
Answer: 70 Explanation:Given ratio of girls : boys = 5 : 7 = 5/7 multiplying the antecedent and consequent by the same number, let by x, girls = 5x, and boys = 7x total = 120; as par given 5x + 7x = 120 => x = 120/12 = 10 hence, girls = 5 × 10 = 50 and Boys = 7 × 10 = 70 answer
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The average weight of A, B and C is 45 kg, that of A and B is 40 kg and B and C is 43 kg. What is the weight of B?
17 kg
26 kg
20 kg
31 kg
Answer: 31 kg Explanation:Weight of A+B+C = 45 × 3 = 135 kg .....(i) Wt. Of A+B = 40 × 2 = 80 kg .....(ii) Weight of B + C = 43 × 2 = 86 kg ...... (iii) Now on adding (ii) and (iii), wt. of A+2B+C = 166kg A+B+ C = 135 kg ....given (i) On Subtracting (i) B = 31 kg ..Ans
2 of 3 〉
The average of following 5 numbers is 8, find the missing number in 7, 5, 3,12,?.
14
13
8
12
Answer: 13 Explanation:The sum of all numbers = 8 × 5 = 40
So, ? = 40 - (7+3+12+5) = 13 Ans.