Simon can see two lights, light A and light B.
Light A flashes every 15 seconds.
Light B flashes every 18 seconds.
At 10 pm, both lights flash at the same time.
How many more times will both lights flash at the same time in the next 4
minutes?

2 Times

Step-by-step explanation:

Simon can see two lights A and B

First, we determine the next time both lights will flash together.

This is done by finding the Least Common Multiple of 15 and 18.

15=3X5

18=

LCM of 15 and 18=

This means that lights A and B will first flash together after 90 seconds.

Now, 240/90= seconds

Therefore, the number of times more both light will flash together in the next 4 Minutes= 2 Times

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.