Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 39
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
TelephoneIn 1876, the first two-way telephone conversation occurred over outdoor wires. Alexander Graham Bell had a two-way conversation with Thomas Watson over the telegraph line linking Boston and East Cambridge. Three days earlier in Boston, 6 Oct 1876, Bell's two-way telephone test of conversation with Watson had been the world's first two-way telephone conversation. |