How many toothpicks would be in the tenth figure?
A) 21
B) 20
C) 11
D) 23

Option (A)

Step-by-step explanation:

From the picture attached,

Number of toothpicks used in every figure form a sequence as,

3, 5, 7, 9.......

It's an Arithmetic progression having,

First term 'a' = 3

Common difference 'd' = 5 - 3 = 2

Since, nth term of an A.P. is given by the formula,

Therefore, 10 figure will have number of toothpicks as,

     = 3 + 18

     = 21

21 toothpicks will be in the 10th figure of the given sequence.

Option (A) will be the answer.

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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.