brainer

noun 0.773

easy

noun 0.586

dead cert

noun 0.574

piece of cake

noun 0.573

foregone conclusion

noun 0.573

birdbrain

noun 0.559

obviousness

noun 0.544

simple

noun 0.536

easy mark

noun 0.535

easy like

noun 0.531

airhead

noun 0.526

nonthinking

noun 0.524

brainteaser

noun 0.522

plain sailing

noun 0.522

no two ways about it

noun 0.521

simpleton

noun 0.519

trivial solution

noun 0.518

nonproblem

noun 0.513

easy meat

noun 0.512

duck soup

noun 0.511

doddle

noun 0.510

stupid

noun 0.506

indubitable

noun 0.502