1) Acuen 2) Acumen 3) Astuteness 4) Craftiness 5) Cunning 6) Foxiness 7) Guile 8) Gumption 9) Insight 10) Insightfulness 11) Judgment 12) Perspicaciousness 13) Perspicacity 14) Sagacity 15) Savvy 16) Skill 17) Slyness 18) Wiliness 19) Wits 1) Astuteness 2) Cleverness 3) Good judgment 4) Group of apes 5) Intelligence 6) Perspicaciousness 7) Perspicacity 8) Sharpness 9) Smartness 10) Wisdom 
Shrewdness is the collective noun for a group of apes.
[n] - intelligence manifested by being astute (as in business dealings)
shrewdness 1. The quality of being shrewd. 2. Intelligence manifested by being astute; such as, in business dealings, politics, etc. 3. An aggregation, or group, of apes.
astuteness noun intelligence manifested by being astute (as in business dealings)