Elitmus Exam Category

is this ques is right or wrong 1024*128+256*512+10 or ques is different can u tell me what is the ques and ans

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Elitmus Other Question

2-digit number,when we multiply digit of this number(2-digit number only),it produces the factor of this number. how many number is possible??
ex:(10 is two digit number
1*0=0, Is 0 is a factor of 10?
1*1=1,is 1 is a factor of 11?.............up to 99)
2 ques is correct out of 7 can any one tell me what is percentile or negative marking in quant section