ITS URGENT Q1: Fill in the blanks. [ /5] i) While calculating HCF using index notation, we choose ____________ index of common prime factors. ii) 5×5×5×5 in index notation can be written as ______________. iii) cube root of 1=____ iv) List any three consecutive perfect squares _______, _______, ________. v) The HCF of 77 and 91 is __________________. Q2: Solve cube root of 512. [ /3] Q3: The lights on three lightships flash at regular intervals. The first light flashes every 15 seconds, 16 seconds and 36 seconds respectively. Given that they flash together at 10:00 p.m. At what time will they next flash together? [ /4] answer if you know the answer. If you spam i will report you . If you answer i will mark you as brainliest and follow you
Answers
Given : The lights on three lightships flash at regular intervals. The first light flashes every 15 seconds, 16 seconds and 36 seconds respectively.
To find : The lights on three lightships flash at regular intervals. The first light flashes every 15 seconds, 16 seconds and 36 seconds respectively.
Solution:
While calculating HCF using index notation, we choose __ONE_____ index of common prime factors.
ii) 5×5×5×5 in index notation can be written as _____5⁴______.
iii) cube root of 1=__1__
iv) List any three consecutive perfect squares ____1___, ___4____, ____9____.
v) The HCF of 77 and 91 is ______7_______.
Q2: Solve cube root of 512.
512 = 8 * 8 * 8
=> 512 = 8³
=> ∛512 = 8
Find LCM of 15 , 16 & 36
15 = 3 * 5
16 = 2 * 2 * 2 * 2
36 = 2 * 2 * 3 * 3
LCM = 2 * 2 * 2 * 2 * 3 * 3 * 5 = 720
720 sec = 12 mins
Lights will flash at 10 : 12 PM together again
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