Identify a pattern in each list of numbers. Then use this pattern to find the next number. 5, -20, 80, -320, 1280, ___

Q: You write down all the numbers from 1 to 1,000,000.  How many times did you write the digit 2?

A: We need to find how many times digit 2 is written.

Q: Each letter represents one digit. Determine the unknown sum. AD +CD A B +C D + A B +CB 79

A:

Q: 5seven x 6seven

A:

Q: What is the Mode for the following numbers: 7, 7, 10, 13, 7, 9, 7, 13, 11

A: Mode is defined as the frequent number in a given data set.

Q: Fill in the blank with the missing term in the pattern 4,-8,16

A:

Q: George withdraws $1400 from his savings account Wednesday. The next day, George deposits $1700 more…

A: incresed money in saving account = deposite - withdraw

Q: 26 100

A:

Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.