LCM AND HCF CTET MCQ

36 The number of factors of 100 are 1. 11 2. 13 3. 9 4. 5

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35 The sum of all the factors of 50 is 1. 87 2. 93 3. 97 4. 84

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34 The number of factors of 84 is 1. 10 2. 18 3. 14 4. 12

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33 Difference of (smallest common multiple of 18, 20 , 30) and (smallest common multiple of 36, 15, 21) is 1. 1500 2. 1080 3. 900 4. 1000

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32 (Smallest common multiple of 18, 24, 48) x (Highest common factor of 18, 24 and 48) is 1. 846 2. 864 3. 380 4. 684

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31 (Smallest common multiple of 25, 40 and 60) x (Smallest common multiple 12, 36, 48) is equal to 1. 46800 2. 68400 3. 86400 4. 6848

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30 There are three street lights which get on for one second after 30 s, 40 s, and 50 s, respectively. If last time they were on simultaneously at 4:00 pm. At what time after 4:00 pm all of them get on again simultaneously? 1. 4:10 pm 2. 4:11 pm 3. 4:12 pm 4. 4:14 pm

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29 Find the least number which, when divided by 12, 16, 24 and 36, leaves a remainder 7 in each case 1. 151 2. 153 3. 156 4. 161

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28 A gardener wants to plant trees in a garden. If the number of trees in each row is the same and there are 20 or 40 or 60 rows, then no tree is left. Find the least number of trees the gardener have 1. 120 2. 360 3. 240 4. 200

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27 If (the product of common positive factors of 36 and 48) = 999 + 9 x '......', then the number which will come in blank is 1. 81 2. 20 3. 9 4. 27

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