AD: Practise SET – 5
[mq] Age & Digits: Level 5 1. Find the number of two-digit numbers \( x \) such that the product of the digits of \( x \) is half of \( x \). 0 2 1 3 4 Check Solution (C): Let \( x = 10t + u \). Condition: \( t \times u =…
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AD: Practise SET – 4
[mq] Age & Digits: Level 4 1. A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the number, the digits are reversed. What is the number? 24 47 35 53 42 Check Solution (C): Let number \( N = 10t + u \). Condition 1:…
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AD: Practise SET – 3
[mq] Age & Digits: Level 3 1. When the digits of a two-digit number are reversed, the new number is 18 more than the original number. If the sum of the digits is 10, what is the original number? 46 64 28 37 55 Check Solution (A): Let number be \(10t + u\). Reverse is…
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AD: Practise SET – 2
[mq] Age & Digits: Level 2 1. The ratio of the ages of Anna and Bob is 3:5. If the sum of their ages is 40, how old is Bob? 15 20 25 30 10 Check Solution (C): Parts: \(3x + 5x = 40 \implies 8x = 40 \implies x = 5\). Bob = \(5x…
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SET: Practise SET – 5
[mq] Set Theory: Level 5 1. Set A has 40 members, Set B has 60 members. If \( A \cap B \) has 25 members, what is the number of members in \( B – A \) (in B but not in A)? 15 35 25 40 20 Check Solution (B): \( n(B – A)…
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SET: Practise SET – 4
[mq] Set Theory: Level 4 1. In a survey of 100 students: 50 take Math, 40 take Physics, 30 take Chemistry. 15 take Math & Physics, 10 take Physics & Chemistry, 10 take Math & Chemistry. 20 take none of the three. How many students take all three subjects? 10 25 15 5 20 Check…