Test Preparation on Science Olympiad Class-7 Paper-1

If ‘+’ is called ‘×’, ‘–’ is called ‘÷’, ‘×’ is called ‘–’
and ‘÷’ is called ‘+’, then what will be the value
of 16 ÷ 64 – 8 × 4 + 2 = ?

Human beings can be categorised as

How many 5’s are there in the following
sequence such that the sum of the two
immediately following digits is greater than the
sum of the two immediately preceding digits? 

3 7 6 5 8 3 2 4 5 5 4 8 7 9 1 5 3 4 8 7 5 9 8 7 6 4

Anuradha remembers that her friend had visited
her after 13th but before 18th of the month, while
Anuradha’s sister remembers that Anuradha’s
friend had visited after 16th but before 20th. If
it was Saturday on 16th of the month, then on
which day of the week, Anuradha’s friend visit
her?

Which part of plant is called food factory?