Number concept is defined as a person’s general understanding to perform operation on numbers. National Council of Teachers Mathematics (NCTM, 2002), USA (it world’s largest mathematics organisation), states that “the foundation for children’s mathematical development established in the earliest years”. Therefore, pre-school age crucial period life and considerable amount attention should be pa...

b a ckground: previous studies have suggested that sex may be a factor influencing basal metabolic rate (bmr) in adults and school age children. however, few data are available about the effects of sex on bmr in pre-school children. in the present study, we investigated whether sex differences contribute to variations in bmr in pre-school age children. m et h o ds : measurements were made on th...