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Start learning 50% faster. Sign in nowSum of squares of first 'n' natural numbers = n × (n + 1) × (2n + 1) ÷ 6
So, average = n × (n + 1) × (2n + 1) ÷ 6n = (n + 1) × (2n + 1) ÷ 6
= (19 + 1) × (2 × 19 + 1) ÷ 6
= 20 × 39 ÷ 6
= 130
Pungency in radish is due to the presence of
Photosynthesis occurs in which cell organelle of the plant?
The gynoecium occupies the highest position while the other parts are situated below it. Which type of flower is that?
When the leaflets are joined together at a common point at the petiole, the type of leaf is
Pea, gulmohur, bean, Cassia have ___ type of symmetry and hance they are ____ flowers.
Which of the following is not a stem modification?
The monocotyledonous plants can be distinguished from dicotyledonous plants by:
Which of these green manuring crop is stem nodulating?
Manures are categorised into bulky and concentrated organic manure. An example of Concentrated organic manure is
____ is quick growing green manure cum fibre crop.
