Question
Three numbers are in the ratio 4 : 9 : 13 and their LCM
is 2340. Their HCF is:Solution
Let, the HCF of the numbers = H So, the three numbers are 4H, 9H, and 13H. According to the question, ⇒ LCM (4H, 9H, 13H) = 2340 ⇒ (4 × 9 × 13) × H = 2340 ⇒ 468 × H = 2340 ⇒ H = 2340/468 ⇒ H = 5 ∴ Their HCF is 5.
1, 27, ?, 343, 729, 1331
29    51    95    183    ?     711
5 14 56 220 1125 6786
...55 46 60 41 65 36 ?
20 25 54 165 662 ?
...140Â Â Â Â 300Â Â Â Â 380Â Â Â Â Â 420Â Â Â Â Â 440Â Â Â Â Â ?
...If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...720    ?     240     180      144     120
...If  2,  7, 20,  x ,  110,  235,
Then,  7 x + 7√x = ?
6000Â Â Â Â Â Â 3191Â Â Â Â Â Â 5216Â Â Â Â Â Â 3847Â Â Â Â Â Â 4688Â Â Â Â Â Â 4247
6125       a             b  �...
