Question
Four machines make a beep after every 1, 3, 5 and
2 min respectively . In 5hrs , how many times do they beep together if they have just beeped together.Solution
LCM of 1, 3, 5 and 2 = 30 That means after 30 min they will beep again together. 30 min = `30/60` hrs = `1/2` [endif]-->hrs Then number of beep in 5hrs =` (5xx2)/1` = 10 times
More HCF and LCM Questions
What will come in the place of question mark (?) in the given expression?
75% of (√64 × 8 - 16) × ? = 15²
(8.6 × 8.6 + 4.8 × 4.8 + 17.2 × 4.8) ÷ (8.62 – 4.82 ) = ? ÷ 19
6 0 - 20 [8 + 12 {8-8 (20-12)+20}-40] ÷ 16 =?
- What will come in place of the question mark (?) in the following questions?
144÷12+18×2=? 75% of 65% of 7/5 of 2420 = ?
Find the simplified value of the given expression:
1.82 + 2.42 + 1.52 - 1.8 x 2.4 - 2.4 x 1.5 - 1.8 x 1.5
(√ 196 x √ 36 x √ 100) = ?% of 200
72% of 486 – 64% of 261 = ?
35% of 240 – 6 2 = ? 2 – √256
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