87+34 use rounding or compatible numbers to estimate the sum

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!