Another dowsing method most dowsers use for a lot of things as an alternative to a pendulum is a 'rub pad'. A piece of smooth glass or porcelain.... a dinner plate or crystal salad bowl might suffice.
If the dowser writes the numbers of the matrix down on a piece of printer paper and, while turned away from it, spins it around a few times on the tabletop, then, without looking at the paper, begins rubbing the thumb or forefinger across the glass surface...... a person might ask it something while instructing it that, say, negative is a rough or sticky rub, positive, smooth and not-sticky, practice it a bit.
Then, resting the one hand on the table (while still turned away from it so it's out of sight, the dowser would use a pointer or fingertip to move around on the paper while rubbing the glass surface and asking for a sticky rub when the pointer or fingertip rests on the number that will hit first during the draw.
For me, that gets about the same success rate as a pendulum. Same with swing-rods.
Jack
Edited in as an afterthought: One thing a person trying such a thing might find helpful, which I neglected to mention earlier.
Peripheral vision seems to be a major tool. If a person's using a pendulum, it helps a lot to avoid looking directly at the object being dowsed. Turning the head in such a way as to see the pennies, whatever, being dowsed only out of the corner of the eye can make a big difference in the success of whatever you're attempting to dowse, whether it's food, vitamin pills, a health condition, or a matrix-set of pennies.
Don't ask me why. I haven't a clue. But when I dowse on a blackjack table for whether to take a card, whether I'm trying to find lost keys, whether I'm trying to decide presence of predators nearby enough to cause me to hurry to get the cats indoors, I generally don't look directly at the pendulum, the dealer/cards on the blackjack table, except out of the corner of my eye, and my success rate's enough better to keep me doing it that way.