Question

21,35,56,91,154,___?whats next number solve step by step​

Answer 1

Answer:

Missing term is $273$ .

Step-by-step explanation:

To find : missing term .

Given series : $21,35,56,91,154, ?$

Solution :

• According to given data we are given with series $21,35,56,91,154, ?$ and we are asked to find missing term .
• To find find the missing term we first observe series and try find out logic used in it .
• Here on observing we can say that , each term of the series is multiplied by $2$ and then successive multiples of $7$ are subtracted from the product obtained to get the next term .
• Starting from first term ,

        $21 \times 2 - 7 = 42 -7 = 35\\\\35 \times2 -14 = 70- 14 = 56\\\\56\times2 -21 = 112-21= 91\\\\91 \times 2-28 = 182 - 28 = 154\\\\154 \times 2 - 35 =308-35= 273$

Answer 2

Answer:

We will get the next number is 273.

Step-by-step explanation:

• As per the question we have to evaluate the given data.

       Given data:- 21,35,56,91,154,

       To find:- 21,35,56,91,154,___?whats next number.

       Solution:-

• The given data is 21,35,56,91,154, We have to find the next number
• We will multiply each term by 2.

• Here multiply each term by 2  we get,

      $\begin{array}{l}21 \times 2-7=35 \\35 \times 2-14=56 \\56 \times 2-21=91 \\91 \times 2-28=154 \\154 \times 2-35=273\end{array}$