Page 27 - Arithmetic

7. LCM of 3, 6, 9, 12, 15, 18 is 180 second 180 seconds = 3 minutes
In 45 minutes, the bell will ring 45 + 1= 15 + 1 = 16 times 3
8. LCM of 100, 150 and 175 is 2100 seconds 2100 seconds = 35 minutes
9. Convert the fraction to decimal 11 = 0.73; 1 = 0.16
17 = 0.85; 24 = 0.96; 41 = 0.82; 19 = 0.76; 13 = 0.52 20 25 50 25 25
10. Only 18004 is divisible by 7.
15 6
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Arithmetic Concept