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Q.

Find the square of 31.?


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a

https://lh5.googleusercontent.com/as2BtiFixZEmUwG1aCyPkiOYdRomG58-4A5fUhwI8i76KigRorJu3rMIIqr1_-3TN4tgPO3GE76_avYBg4T52OirihjZ3RJcWU9f9EFG6Ra-DU6s7Rx67i_C_t-_Zf2xi9CUxtJcXfayravhUbZceA

b

https://lh3.googleusercontent.com/1TQ3twiuHSLWhztMKlI12KAsfblhBOQ-s5KS4tRpUJnmwVuRRff2o8z7VqfrtrQmgwu6tExjgo93dVzWGart_hF9BfC8gSDpKsh_XQLLpJk1NzhiLkKCN6wlLVIQLfz6d53SD4c7yr9-OEgZU3a8WA

c

https://lh4.googleusercontent.com/760iWHjtMRqNs_YfO4MoGENPo-9D284ubMevnbIt4oJgYD8QqXA1aZVCa-sxKXkc_mvMSkC2WicBmaqJFjsAt_aUPr3wijpASHx33qSzk6VQTqJjl0WAo1SMZ3lj_NBIb5apgrKhIn0pHhQm8d7fVg

d

https://lh3.googleusercontent.com/A-IRYOMG3H9BhBrb102Ig469fSsc-teP1tvHqwT3IkU9BUf6R6tpBthVw6vVMPMlpihH3cJH44Fs6f8SodXGf1l04miaQ_AqwsKfgkc15cL74u0jKBc_QGf__xTHZ_a-nxTUCDl3VOF3xNwws9v4rg

answer is A.

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Detailed Solution

Concept- By squaring a whole number or an integer, one can create perfect squares. We can use a set of four and a second set of six marbles for this. Let's set the marbles in order. With four marbles, we can create a square with two rows and two marbles in each row. We can create a rectangle with 6 marbles that has 2 rows with 3 marbles in each row.
the concept used in this question is to find the square of any number just multiply the number to itself
https://lh3.googleusercontent.com/Gmvrmq6W_59BjbzUgLFPBTjtfLNgLN3nhSJ-QZfeJ-8tHR3oBja-XLwenbfIGlgDRrgABo5Xq4F9zxAosnt-Aj6d2DYflTAh_qy0X4PaQ0UMa4LsYxkVfJtCN1XBeCB-bMzWbckIqjorWdE6-2Go3Qhttps://lh6.googleusercontent.com/6BO53DSlsctfdOv6czq7kc-EXQRfdhadFdWUcNFAMfh-ODhaNGxTCUTfIuasYtgvgZeESwt1QfB_bplu7nT0Ec9oqU82D4zrHZSE8Ae6ZQFMJ_OcHOcuRaNnflqpX4djAbg_HvKOS1K78jwQqvWdmAHence, the correct answer is option number 1) 961
 
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