How do you complete the pattern with the next two numbers. 10, 15, 21, 28,?

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Answer 1 · 2016-10-27T22:06:01

The pattern seems to be #a_n=a_(n-1)+n#, with #a_4 =10# as the first term

According to the formula above:

#a_4 =10#

#a_5=a_4+5=10+5=15#

#a_6=a_5+6=15+6=21#

#a_7=a_6+7=21+7=28#

So the next two numbers are:

#a_8=a_7+8=28+8=36#

#a_9=a_8+9=36+9=45#